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  1. Qt
  2. QTBUG-95846

QPropertyAlias crashes in all situations

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: P1: Critical P1: Critical
    • 6.2.0 Beta4, 6.3.0 Alpha
    • 6.2.0 FF, 6.2.0 Alpha, 6.2.0 Beta1, 6.2.0 Beta2
    • Core: Object Model
    • None
    • All
    • e4d62651c278c468f71ce097979bc1183ffd0713 (qt/qtbase/dev) 7f97d21105f0164c1d3d623d66af56b9f52ae19b (qt/qtbase/6.2)

      Since 6.2, QPropertyAlias can no longer be instantiated without leading to immediate crash.

      The crash is cased by QPropertyObserver::aliasedProperty() returning nullptr. nullptr is not allowed for setting observer (QBindableInterface::SetObserver).

      QPropertyAlias uses QPropertyObserver::aliasedProperty() in all its functions to retrieve the aliased property and strictly requires a pointer to an existing property.

       

      Code example:

      QProperty<int> property;
QPropertyAlias<int> alias(&property); // crash

       

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            fabiankosmale Fabian Kosmale
            docjambi Peter Droste
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              Created:
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              Resolved:

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